Consolidated Statements of Mandatorily Redeemable Convertible Preferred Stock and Changes in Stockholders' Deficit (USD $) In Thousands, except Share data, unless otherwise specified		Total	Common Stock		Preferred Stock		Additional Paid-in Capital	Accumulated Other Comprehensive Income	Accumulated Deficit
Balance at Dec. 31, 2012		$ (63,472)	$ 1	[1],[2],[3]	$ 162,466	[1],[4]	$ 17,752	$ 345	$ (81,570)
Balance (in shares) at Dec. 31, 2012	[1]		7,722,262	[2],[3]	32,563,192	[4]
Increase (Decrease) in Stockholders' Equity
Accretion of issuance costs		(191)			191	[1],[4]	(191)
Exercise of stock options		173					173
Exercise of stock options (in shares)		68,791	68,791	[1],[2],[3]
Stock-based compensation expense		1,501					1,501
Net loss		(5,432)							(5,432)
Foreign currency translation adjustment		(150)						(150)
Balance at Jun. 30, 2013		$ (67,571)	$ 1	[1],[2],[3]	$ 162,657	[1],[4]	$ 19,235	$ 195	$ (87,002)
Balance (in shares) at Jun. 30, 2013	[1]		7,791,053	[2],[3]	32,563,192	[4]

[1] All share amounts have been restated to reflect a 1-for-1.5 reverse stock split, refer to note 10.

[2] The common stock includes two series of common stock, refer to note 10.

[3] All share amounts have been restated to reflect the renaming of the Company's "Series I common stock" to "common stock", refer to note 10.

[4] The preferred stock includes several series of preferred stock, refer to note 10.